The invention belongs to the technical field of chaotic lasers, and discloses a high-power tunable chaotic laser light source device, including a tunable DBR laser, an optical attenuator, a tunable laser, a first optical coupler, a single-mode fiber, a fiber Bragg grating, a first Two optical couplers, broadband dielectric film mirrors; the tunable DBR laser is connected to one end of the optical attenuator, the other end of the optical attenuator is connected to the first port of the first optical coupler, and the tunable laser is connected to the first optical The second port of the coupler is connected, and the common port of the first optical coupler is connected to the single-mode fiber and the fiber Bragg grating in sequence, and then connected to the common port of the second optical coupler, and the first port of the second optical coupler is reflected by the broadband dielectric film The mirror is connected, and the second port is used to output the amplified chaotic laser; the invention can realize high-power tunable chaotic laser output in the order of 100 watts, has a large tunable range, good time domain stability, and good beam quality.